Crankshaft Position Sensor: Testing and Inspection

CRANKSHAFT POSITION SENSOR




The crankshaft position sensor which consist of a magnetic and coil is installed on the flywheel. The voltage signal from this crankshaft position sensor is provided to the ECM for detecting the engine RPM and position of crankshaft.

CIRCUIT DIAGRAM





HARNESS INSPECTION PROCEDURE





SENSOR INSPECTION




1. Disconnect the crankshaft position sensor connector
2. Measure the resistance between terminal 2 and 3.

Resistance at 20°C (68°F): 0.486 - 0.594 kOhms

3. If the resistance deviates far from the standard value, replace the sensor.

Clearance between the crankshaft position sensor and crankshaft position sensor wheel: 0.5 - 1.5 mm (0.020 - 0.059 in.)

Tightening torque: 9 - 11 Nm (90 - 110 kg.cm, 6.6 - 8.1 lb.ft)


TROUBLESHOOTING PROCEDURES





TROUBLESHOOTING HINTS
1. If unexpected shocks are felt during driving or the engine stalls suddenly, shake the crankshaft position sensor harness. If this causes the engine to stall, check for poor contact of the sensor connector.
2. If the tachometer reads 0 rpm when the engine is cranked, check for faulty crankshaft position sensor or ignition system problems.
3. If the tachometer reads 0 rpm when the engine is cranked and it does not start ignition coil or power TR in ECM defect can be considered.
4. Engine can be stalled when the crankshaft position sensor cable is closed to the high voltage cable due to the noise by the high voltage.